Huge fixes to glibc build, so that we can build at least (and at last):
- use ports addon even when installing headers,
- use optimisation (-O) when installing headers, to avoid unnecessary warnings (thanks Robert P. J. DAY for pointing this out!),
- lowest kernel version to use is only X.Y.Z, not X.Y.Z.T,
- a bit of preparations for NPTL (RSN I hope),
- fix fixing the linker scripts (changing the backup file is kind of useless and stupid);

Shut uClibc finish step: there really is nothing to do;

Add a patch for glibc-2.3.6 weak aliases handling on some archs (ARM and ALPHA at least);

Did not catch the make errors: fixed the pattern matching in scripts/functions;

Introduce a new log level, ALL:
- send components' build messages there,
- DEBUG log level is destined only for crosstool-NG debug messages,
- migrate sub-actions to use appropriate log levels;

Update the armeb-unknown-linux-gnu sample:
- it builds!
- uses gcc-4.0.4 and glibc-2.3.6,
- updated to latest config options set.

 --- glibc-2.1.3/sunrpc/Makefile.orig	2004-05-12 12:26:58.000000000 -0700

 +++ glibc-2.1.3/sunrpc/Makefile	2004-05-12 12:29:05.000000000 -0700

 @@ -123,9 +123,8 @@

    $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)

  	$(+link)

 -# Tell rpcgen where to find the C preprocessor.

 -rpcgen-cmd = $(built-program-cmd) -Y `$(CC) -print-file-name=cpp | \

 -				      sed "s|/cpp$$||"`

 +# Don't tell rpcgen where to find the C preprocessor -- let it find it itself.

 +rpcgen-cmd = $(built-program-cmd) 

  # Install the rpc data base file.

  $(inst_sysconfdir)/rpc: etc.rpc $(+force)